The scary history of the Doomsday Clock

It's two minutes to midnight. Even if you haven't ever heard of the Bulletin of the Atomic Scientists and their Doomsday Clock, those words probably make you shiver, just a little bit, because bad things always happen at midnight. And midnight on the Doomsday Clock is the baddest of the bad, the hour of the apocalypse. That's right, the end of the world. Boom. Everyone dies.
Hey, cheer up. When all these facts about the Doomsday Clock have sufficiently freaked you out, you can switch gears and check out the Zombie Doomsday Clock instead. Because that's an apocalypse we can all get behind.